6 #include <libubox/uapi.h>
11 static struct avl_tree devices;
13 static int avl_strcmp(const void *k1, const void *k2, void *ptr)
15 return strcmp(k1, k2);
18 static void API_CTOR dev_init(void)
20 avl_init(&devices, avl_strcmp, false, NULL);
23 static void free_simple_device(struct device *dev)
29 static void broadcast_device_event(struct device *dev, enum device_event ev)
31 struct device_user *dep, *tmp;
33 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
41 static int set_device_state(struct device *dev, bool state)
51 int claim_device(struct device *dev)
55 DPRINTF("claim device %s, new refcount: %d\n", dev->ifname, dev->active + 1);
56 if (++dev->active != 1)
59 broadcast_device_event(dev, DEV_EVENT_SETUP);
60 ret = dev->set_state(dev, true);
62 broadcast_device_event(dev, DEV_EVENT_UP);
69 void release_device(struct device *dev)
72 DPRINTF("release device %s, new refcount: %d\n", dev->ifname, dev->active);
73 assert(dev->active >= 0);
78 broadcast_device_event(dev, DEV_EVENT_TEARDOWN);
79 dev->set_state(dev, false);
80 broadcast_device_event(dev, DEV_EVENT_DOWN);
83 int check_device_state(struct device *dev)
85 if (!dev->type->check_state)
88 return dev->type->check_state(dev);
91 void init_virtual_device(struct device *dev, const struct device_type *type, const char *name)
97 strncpy(dev->ifname, name, IFNAMSIZ);
99 fprintf(stderr, "Initialize device '%s'\n", dev->ifname);
100 INIT_LIST_HEAD(&dev->users);
104 int init_device(struct device *dev, const struct device_type *type, const char *ifname)
108 init_virtual_device(dev, type, ifname);
111 dev->set_state = set_device_state;
113 dev->avl.key = dev->ifname;
115 ret = avl_insert(&devices, &dev->avl);
119 check_device_state(dev);
124 struct device *get_device(const char *name, bool create)
126 static const struct device_type simple_type = {
128 .check_state = system_if_check,
129 .free = free_simple_device,
134 if (strchr(name, '.'))
135 return get_vlan_device_chain(name, create);
137 dev = avl_find_element(&devices, name, dev, avl);
144 dev = calloc(1, sizeof(*dev));
145 init_device(dev, &simple_type, name);
150 void cleanup_device(struct device *dev)
152 struct device_user *dep, *tmp;
154 fprintf(stderr, "Clean up device '%s'\n", dev->ifname);
155 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
159 dep->cb(dep, DEV_EVENT_REMOVE);
163 avl_delete(&devices, &dev->avl);
166 void set_device_present(struct device *dev, bool state)
168 if (dev->present == state)
171 DPRINTF("Device '%s' %s present\n", dev->ifname, state ? "is now" : "is no longer" );
172 dev->present = state;
173 broadcast_device_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
176 void add_device_user(struct device_user *dep, struct device *dev)
179 list_add(&dep->list, &dev->users);
180 if (dep->cb && dev->present) {
181 dep->cb(dep, DEV_EVENT_ADD);
183 dep->cb(dep, DEV_EVENT_UP);
187 void remove_device_user(struct device_user *dep)
189 struct device *dev = dep->dev;
191 list_del(&dep->list);
193 if (list_empty(&dev->users)) {
194 /* all references have gone away, remove this device */
202 cleanup_devices(void)
204 struct device *dev, *tmp;
206 avl_for_each_element_safe(&devices, dev, avl, tmp) {
207 if (!list_empty(&dev->users))